Question

calculeaza : a:10 +300=400
(35+a)x10-25=325
(a-25):5+90=100
(200-a):10+90=100
500:a+(300:10-20)=60
(30x10)-(4xa+50x2)=100

Answer 1

a:10+300=400
a:10=400-300
a:10=100
a=100*10
a=1000

(35+a)*10-25=325
(35+a)*10=325+25
(35+a)*10=350
35+a=350:10
35+a=35
a=35-35
a=0

(a-25);5+90=100
(a-25):5=100-90
(a-25);5=10
a-25=5*10
a-25=50
a=50+25
a=75

(200-a):10+90=100
(200-a):10=100-90
(200:a):10=10
200-a=10*10
200-a=100
a=200-100
a=100

500:a+(300:10-20)=60
500:a+(30-20)=60
500:a+10=60
500:a=60-10
500:a=50
a=500:50
a=10

(30*10)-(4*a+50*2)=100
300-(4*a+100)=100
4*a+100=300-100
4*a+100=200
4*a=200-100
4*a=100
a=100:4
a=25